EP0106006B1 - Procédé pour la prédétermination du vecteur courant statorique - Google Patents

Procédé pour la prédétermination du vecteur courant statorique Download PDF

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Publication number
EP0106006B1
EP0106006B1 EP82890149A EP82890149A EP0106006B1 EP 0106006 B1 EP0106006 B1 EP 0106006B1 EP 82890149 A EP82890149 A EP 82890149A EP 82890149 A EP82890149 A EP 82890149A EP 0106006 B1 EP0106006 B1 EP 0106006B1
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EP
European Patent Office
Prior art keywords
alpha
indicator
switching
positions
discrete
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP82890149A
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German (de)
English (en)
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EP0106006A1 (fr
Inventor
Karl Dipl.-Ing.Dr. Schiftner
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Andritz Hydro GmbH Austria
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Andritz Hydro GmbH Austria
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Priority to AT82890149T priority Critical patent/ATE55663T1/de
Priority to DE8282890149T priority patent/DE3280229D1/de
Priority to EP82890149A priority patent/EP0106006B1/fr
Publication of EP0106006A1 publication Critical patent/EP0106006A1/fr
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Publication of EP0106006B1 publication Critical patent/EP0106006B1/fr
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
    • H02P21/24—Vector control not involving the use of rotor position or rotor speed sensors
    • H02P21/28—Stator flux based control
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
    • H02P21/24—Vector control not involving the use of rotor position or rotor speed sensors
    • H02P21/28—Stator flux based control
    • H02P21/30—Direct torque control [DTC] or field acceleration method [FAM]
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
    • H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
    • H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using DC to AC converters or inverters
    • H02P27/08—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using DC to AC converters or inverters with pulse width modulation
    • H02P27/12—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using DC to AC converters or inverters with pulse width modulation pulsing by guiding the flux vector, current vector or voltage vector on a circle or a closed curve, e.g. for direct torque control

Definitions

  • the invention relates to a method for specifying the stator flow vector of three-phase machines when fed by a multiphase or p-pulse, preferably 6-pulse converter with impressed current, in which p discrete stator flow indicator positions are present.
  • a method according to the preamble of the claim is from the AT-PS 341 046 known.
  • the size of the pendulum torques is then dependent on the flow only on the size of the intermediate circuit current, which determines the amplitude of the green oscillation output current of the machine-side converter, and on the load angle between current fundamental and flux fundamental.
  • the frequency of the pendulum torques decreases as the supply frequency of the DC link converter falls, and at a low frequency leads to an uneven, jerky run due to the low smoothing effect of the rotating flywheel masses.
  • the current profile of the converter output currents changes in pulsed operation from a closed 120 ° current block during each half-period to an odd number of current pulses and gaps of different widths with an average trapezoidal profile, with current pulses of a current direction during a half-period of 180 ° and current pulses of the reverse current direction in a second half period can occur.
  • the angle sum of the positive Stro.mpulse remains at 120 ° the same as with the closed 120 ° current block.
  • the machine converter of a DC link converter for feeding a three-phase asynchronous machine is a self-guided, force-commutated converter, the commutation elements of which consist of commutation capacitors arranged in the converter and the leakage inductances of the supplied DAM. Both together specify the necessary and adherent commutation time t k .
  • This time is almost constant with a low supply frequency of the converter, regardless of the load state.
  • the commutation time t k is at the same time the minimum pulse width t mln or pulse gap of the current pulses or current gaps in the output currents of the converter, which must not be undercut without loss of the converter's commutation capability.
  • the pulse frequency f T which describes the frequency of the torque oscillations in the pulse mode, should either be kept constant or at least not be less than a predetermined minimum value.
  • the zero angle 00 describes the angle of one of the p discrete flow indicators with respect to a (stator) impact-resistant reference system.
  • the object of the invention is to provide a method which was at least in the leading and trailing surroundings of the p discrete flow area pointers. and With is used and avoids the above restrictions.
  • the invention is defined by the characterizing features of the claim.
  • this pulse method according to the invention with a full revolution of the flow-through space pointer, the 2 or 3 selected discrete flow-through pointer positions between which switching (poling) is carried out are changed 2 p times, depending on the angular range present.
  • DE-A-2 552 602 discloses a three-strand pulse method in a three-phase machine.
  • the switching state of the converter is described here, in addition to a p-fold ring counter, by two binary pulse signals P 1 and P 2, which state whether it is switched to the leading or trailing discrete flow indicator position and how long it should remain in it.
  • the pulse patterns P 1 and P 2 are either formed freely by scanning two reference oscillations with a triangular scanning oscillation or are stored permanently in memories.
  • Fig. 1 shows a diagram of the stator flow space pointer I with section-wise switching between 2 and more than 2 adjacent pointer positions
  • Fig. 2 shows the associated time profiles of the converter output currents i R , i s , i T
  • Fig. 3 shows a basic circuit diagram of a 6-pulse DC link converter with a Machine converter in phase sequence.
  • i R i R (t)
  • i s i s (t)
  • the lathe operators take into account the axial alignment of the 3-strand DAM.
  • Table 1 shows the relationship between the 6 possible switching positions of the converter and the associated discrete flow area pointer positions.
  • the switching functions for the currents i R , i s and i T recorded in columns 1, 3 and 4 in Table 1 can at the same time be interpreted as distribution functions for the positive and the negative evaluated intermediate circuit current.
  • the intermediate circuit current i d impressed by the mains converter (NSR) according to FIG. 3 flows over the positive bridge half of the machine converter (MSR) and the phase winding R to the star point of the DAM and thence negative back to the intermediate circuit via the strand winding S and the negative bridge half of the MSR.
  • 6 - apart from the commutation period - are only taken.
  • switch positions 1 to 6 are run through in ascending or descending sense without intermediate circuits, the flow indicator then jumps from one discrete position to the next in a counterclockwise or clockwise direction.
  • Each step forward in the sense of circulation means an abrupt advance of the flow compared to the flow circulating at an approximately constant angular velocity and a subsequent, continuous, relative lag.
  • the length of each flow space pointer expresses the amount of flow in the respective direction that is present during a 1/6 period.
  • the size of the flow in each of the 6 discrete spatial directions is only dependent on the size of the intermediate circuit current i d in the case of basic oscillation clocking if one assumes approximately - as assumed above - an infinitely rapid commutation.
  • pulsed operation switching takes place between several switching positions of the converter during the 1/6 period.
  • the sense of rotation of the effective flow area pointer is not determined by switching from one discrete position to the next, but rather by increasing or decreasing the switch-on times of certain selected switching positions of the machine converter MSR and thus the dwell times t in the discrete flow space pointer positions.
  • the switching positions are changed in the form of a periodic switching cycle with the period T A. This period is less than or at most equal to 1/6 of the fundamental period of the MSR which is why the flow changes direction several times during T M / 6.
  • the sum of the switch-on times x istx 1 1, if the commutation time is neglected again.
  • the flooding in the excellent spatial directions, which are reduced in accordance with the related switch-on times, can be represented in the flooding pointer diagram as shortened flooding pointers x, I i .
  • the vectorial sum of the shortened flow pointers of a clock period T A then describes the path of the effective flow pointer whose length is always less than the length of one of the 6 discrete flow indicators in basic shrinkage mode:
  • Fig. 1 now shows the diagram of the stator flow indicator when switching in sections between 2 and more than 2 adjacent discrete flow indicator layers.
  • the pointer tips of the 6 markedly shown flow indicators are connected in the form of a hexagon, which approximately describes the trajectory of the effective flow indicator when using the known two-strand pulse method.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Ac Motors In General (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)

Claims (1)

  1. Procède pour déterminer à l'avance le vecteur ampères-tours du stator d'une machine à champ tournant dans le cas où elle est alimentée par un redresseur de courant multiphasé ou à p impulsions, de préférence à 6 impulsions, avec courant indépendant de la charge, dans lequel p positions discrètes du vecteur ampères-tours du stator α sont présentes et dans lequel la position effective a du vecteur ampères-tours du stator est prédéterminée par masquage entre les p positions vectorielles sur le temps de séjour dans les différentes positions, caractérisé en ce que, pendant la p ième partie d'une période d'oscillation de base dans la réoion
    Figure imgb0019
    entre deux positions vectorielles adjacentes dans la région
    Figure imgb0020
    une position vectorielle discrète est masquée et démasquée en alternance entre trois positions discrètes du vecteur ampères-tours, l'angle αmin étant l'angle d'impulsion minimum auquel le maintien du temps de commutation prédéterminé par la machine à champ tournant et le redresseur de courant est garanti, et ceci étant obtenu par deux oscillations de référence liées rigidement aux oscillations de base du système de courant multiphasé, lesdites oscillations de référence étant comparées de façon connue en soi à une oscillation d'exploration triangulaire, qui se déroule librement à une fréquence fixe, de sorte que l'on produit des dessins à déroulement libre.
EP82890149A 1982-10-18 1982-10-18 Procédé pour la prédétermination du vecteur courant statorique Expired - Lifetime EP0106006B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT82890149T ATE55663T1 (de) 1982-10-18 1982-10-18 Verfahren zur vorgabe des staenderdurchflutungsvektors.
DE8282890149T DE3280229D1 (de) 1982-10-18 1982-10-18 Verfahren zur vorgabe des staenderdurchflutungsvektors.
EP82890149A EP0106006B1 (fr) 1982-10-18 1982-10-18 Procédé pour la prédétermination du vecteur courant statorique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP82890149A EP0106006B1 (fr) 1982-10-18 1982-10-18 Procédé pour la prédétermination du vecteur courant statorique

Publications (2)

Publication Number Publication Date
EP0106006A1 EP0106006A1 (fr) 1984-04-25
EP0106006B1 true EP0106006B1 (fr) 1990-08-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP82890149A Expired - Lifetime EP0106006B1 (fr) 1982-10-18 1982-10-18 Procédé pour la prédétermination du vecteur courant statorique

Country Status (3)

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EP (1) EP0106006B1 (fr)
AT (1) ATE55663T1 (fr)
DE (1) DE3280229D1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3671344D1 (de) * 1985-07-03 1990-06-21 Siemens Ag Verfahren zur steuerung des phasenwinkels des ausgangsstroms oder der ausgangsspannung eines umrichters und einrichtung zur durchfuehrung.
US4688163A (en) * 1986-07-01 1987-08-18 Siemens Aktiengesellschaft Method for controlling the phase angle of the output current or the output voltage of a frequency converter and apparatus for carrying out the method
DE3870056D1 (de) * 1987-07-07 1992-05-21 Bbc Brown Boveri & Cie Verfahren und einrichtung zum betrieb einer drehfeldmaschine.

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT323847B (de) * 1972-07-26 1975-07-25 Siemens Ag Drehvektor-steueranordnung für die phasenlage des ständerstromvektors bei einer über einen mehrsphasigen umrichter gespeisten drehfeldmaschine
AT341046B (de) * 1975-04-03 1978-01-10 Siemens Ag Drehvektor-steueranordnung fur die phasenlage des standerstromvektors bei einer uber einen mehrphasigen umrichter gespeisten drehfeldmaschine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4028600A (en) * 1973-08-23 1977-06-07 Siemens Aktiengesellschaft Method and apparatus for slow speed operation of an inverter controlled rotating field machine
DE2552602A1 (de) * 1975-11-24 1977-06-02 Michael Dr Ing Blumenthal Verfahren zur pulswinkelmodulation des staenderstromvektors von drehfeldmaschinen
DE2704533C2 (de) 1977-02-03 1986-06-05 Siemens AG, 1000 Berlin und 8000 München Einrichtung zur Steuerung der Lage des Ständerstromvektors einer über einen Umrichter mit steuerbaren Ventilen und mit eingeprägtem Zwischenkreisstrom gespeisten Drehfeldmaschine
DE2756952C3 (de) 1977-12-21 1981-11-19 Brown, Boveri & Cie Ag, 6800 Mannheim Digitaler Steuersatz für einen selbstgeführten Stromrichter

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT323847B (de) * 1972-07-26 1975-07-25 Siemens Ag Drehvektor-steueranordnung für die phasenlage des ständerstromvektors bei einer über einen mehrsphasigen umrichter gespeisten drehfeldmaschine
AT341046B (de) * 1975-04-03 1978-01-10 Siemens Ag Drehvektor-steueranordnung fur die phasenlage des standerstromvektors bei einer uber einen mehrphasigen umrichter gespeisten drehfeldmaschine

Also Published As

Publication number Publication date
EP0106006A1 (fr) 1984-04-25
DE3280229D1 (de) 1990-09-20
ATE55663T1 (de) 1990-09-15

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